Python twisted.internet.interfaces.IConsumer() Examples

def receiveFromConnection(self, commands, protocol):
        """
        Retrieves a file or listing generated by the given command,
        feeding it to the given protocol.

        @param command: list of strings of FTP commands to execute then receive
            the results of (e.g. LIST, RETR)
        @param protocol: A L{Protocol} *instance* e.g. an
            L{FTPFileListProtocol}, or something that can be adapted to one.
            Typically this will be an L{IConsumer} implemenation.

        @returns: L{Deferred}.
        """
        protocol = interfaces.IProtocol(protocol)
        wrapper = ProtocolWrapper(protocol, defer.Deferred())
        return self._openDataConnection(commands, wrapper) 

def writeTo(self, transport):
        """
        Format this L{Request} as an HTTP/1.1 request and write it to the given
        transport.  If bodyProducer is not None, it will be associated with an
        L{IConsumer}.

        @param transport: The transport to which to write.
        @type transport: L{twisted.internet.interfaces.ITransport} provider

        @return: A L{Deferred} which fires with L{None} when the request has
            been completely written to the transport or with a L{Failure} if
            there is any problem generating the request bytes.
        """
        if self.bodyProducer is None:
            # If the method semantics anticipate a body, include a
            # Content-Length even if it is 0.
            # https://tools.ietf.org/html/rfc7230#section-3.3.2
            if self.method in (b"PUT", b"POST"):
                self._writeToEmptyBodyContentLength(transport)
            else:
                self._writeHeaders(transport, None)
        elif self.bodyProducer.length is UNKNOWN_LENGTH:
            return self._writeToBodyProducerChunked(transport)
        else:
            return self._writeToBodyProducerContentLength(transport) 

def receiveFromConnection(self, commands, protocol):
        """
        Retrieves a file or listing generated by the given command,
        feeding it to the given protocol.

        @param commands: list of strings of FTP commands to execute then receive
            the results of (e.g. C{LIST}, C{RETR})
        @param protocol: A L{Protocol} B{instance} e.g. an
            L{FTPFileListProtocol}, or something that can be adapted to one.
            Typically this will be an L{IConsumer} implementation.

        @return: L{Deferred}.
        """
        protocol = interfaces.IProtocol(protocol)
        wrapper = ProtocolWrapper(protocol, defer.Deferred())
        return self._openDataConnection(commands, wrapper) 

def writeTo(self, transport):
        """
        Format this L{Request} as an HTTP/1.1 request and write it to the given
        transport.  If bodyProducer is not None, it will be associated with an
        L{IConsumer}.

        @param transport: The transport to which to write.
        @type transport: L{twisted.internet.interfaces.ITransport} provider

        @return: A L{Deferred} which fires with L{None} when the request has
            been completely written to the transport or with a L{Failure} if
            there is any problem generating the request bytes.
        """
        if self.bodyProducer is None:
            # If the method semantics anticipate a body, include a
            # Content-Length even if it is 0.
            # https://tools.ietf.org/html/rfc7230#section-3.3.2
            if self.method in (b"PUT", b"POST"):
                self._writeToEmptyBodyContentLength(transport)
            else:
                self._writeHeaders(transport, None)
        elif self.bodyProducer.length is UNKNOWN_LENGTH:
            return self._writeToBodyProducerChunked(transport)
        else:
            return self._writeToBodyProducerContentLength(transport) 

def writeTo(self, transport):
        """
        Format this L{Request} as an HTTP/1.1 request and write it to the given
        transport.  If bodyProducer is not None, it will be associated with an
        L{IConsumer}.

        @return: A L{Deferred} which fires with C{None} when the request has
            been completely written to the transport or with a L{Failure} if
            there is any problem generating the request bytes.
        """
        if self.bodyProducer is not None:
            if self.bodyProducer.length is UNKNOWN_LENGTH:
                return self._writeToChunked(transport)
            else:
                return self._writeToContentLength(transport)
        else:
            self._writeHeaders(transport, None)
            return succeed(None) 

def receiveFromConnection(self, commands, protocol):
        """
        Retrieves a file or listing generated by the given command,
        feeding it to the given protocol.

        @param commands: list of strings of FTP commands to execute then receive
            the results of (e.g. C{LIST}, C{RETR})
        @param protocol: A L{Protocol} B{instance} e.g. an
            L{FTPFileListProtocol}, or something that can be adapted to one.
            Typically this will be an L{IConsumer} implementation.

        @return: L{Deferred}.
        """
        protocol = interfaces.IProtocol(protocol)
        wrapper = ProtocolWrapper(protocol, defer.Deferred())
        return self._openDataConnection(commands, wrapper) 

def start(self, protocol):
        this = self

        class Consumer(object):
            implements(IConsumer)

            def registerProducer(self, producer, streaming):
                protocol.makeConnection(producer)
                this._maybeLoopDelivery()

            def write(self, data):
                protocol.dataReceived(data)

            def unregisterProducer(self):
                this._done(protocol)
        self.beginFileTransfer(self.filePath.open(), Consumer()) 

def send(consumer):
        """
        Produce the contents of the given path to the given consumer.  This
        method may only be invoked once on each provider.

        @type consumer: C{IConsumer}

        @return: A Deferred which fires when the file has been
        consumed completely.
        """ 

def receive():
        """
        Create a consumer which will write to this file.  This method may
        only be invoked once on each provider.

        @rtype: C{Deferred} of C{IConsumer}
        """ 

def send(consumer):
        """
        Produce the contents of the given path to the given consumer.  This
        method may only be invoked once on each provider.

        @type consumer: C{IConsumer}

        @return: A Deferred which fires when the file has been
        consumed completely.
        """ 

def sendListResponse(self, name, response):
        self.sendLine(self._formatOneListResponse(name, *response))


    # Proxy IConsumer to our transport 

def receive():
        """
        Create a consumer which will write to this file.  This method may
        only be invoked once on each provider.

        @rtype: C{Deferred} of C{IConsumer}
        """ 

def send(consumer):
        """
        Produce the contents of the given path to the given consumer.  This
        method may only be invoked once on each provider.

        @type consumer: C{IConsumer}

        @return: A Deferred which fires when the file has been
        consumed completely.
        """ 

def sendListResponse(self, name, response):
        self.sendLine(self._formatOneListResponse(name, *response))


    # Proxy IConsumer to our transport 

def test_interface(self):
        """
        L{ChunkedEncoder} instances provide L{IConsumer}.
        """
        self.assertTrue(
            verifyObject(IConsumer, ChunkedEncoder(StringTransport()))) 

def close(self):
        """Called by reader of stream when it is done reading."""
        self.buffer = []
        self.closed = True
        if self.producer is not None:
            self.producer.stopProducing()
            self.producer = None
        self.deferred = None

    # IConsumer implementation 

def bindAddress(self):
        """
        Choose a path for the client side of the UNIX socket.

        This should be unique to avoid errors.
        - Use the tmp directory, so that they are sure to be cleaned up.
        - Use the PID for uniqueness if the daemon is restarted.
        - Use the counter for uniqueness across multiple requests.
        """
        return "/tmp/hostapd-{}-{}.sock".format(os.getpid(), self.instance)

    #
    # IConsumer interface
    # 

def sendListResponse(self, name, response):
        self.sendLine(self._formatOneListResponse(name, *response))

    # Proxy IConsumer to our transport 

def test_verifyConsumer(self):
        """
        L{_ProcessEndpointTransport}s provide L{IConsumer}.
        """
        verifyObject(IConsumer, self.endpointTransport) 

def test_interface(self):
        """
        L{ChunkedEncoder} instances provide L{IConsumer}.
        """
        self.assertTrue(
            verifyObject(IConsumer, ChunkedEncoder(StringTransport()))) 

def send(consumer):
        """
        Produce the contents of the given path to the given consumer.  This
        method may only be invoked once on each provider.

        @type consumer: C{IConsumer}

        @return: A Deferred which fires when the file has been
        consumed completely.
        """ 

def sendListResponse(self, name, response):
        self.sendLine(self._formatOneListResponse(name, *response))

    # Proxy IConsumer to our transport 

def test_verifyConsumer(self):
        """
        L{_ProcessEndpointTransport}s provide L{IConsumer}.
        """
        verifyObject(IConsumer, self.endpointTransport) 

def test_interface(self):
        """
        L{ChunkedEncoder} instances provide L{IConsumer}.
        """
        self.assertTrue(
            verifyObject(IConsumer, ChunkedEncoder(StringTransport()))) 

def onMessage(self, payload, isBinary):
        if self.consumer is not None:
            self.consumer.write(payload)

    #
    # IConsumer interface
    #